Double box dump trailer

ABSTRACT

A double box dump trailer in which a relatively long rear box is mounted on the trailer for dumping with a hydraulic mechanism. A somewhat smaller forward box is mounted on the trailer for dumping into the rear box with a hydraulic mechanism. The forward box is provided with an upwardly sloping dumping chute which overlies the rear box when the front box is raised to its fullest extent.

I United States Patent 1151 3,674,312

ORear 1 July 4, 1972 [54] DOUBLE BOX DUMP TRAILER 3,120,408 2/1964 Peuss.298/8 T [72] Inventor: Cecil N. ORear, 1ll8 Claiborne Ave., gag Mmden71055 3,378,302 4/1968 Doeglasetal. ..298/8 [22] Filed: July 17, 1970Primary Examiner-A. Harry Levy [21] P 55648 AttorneyBerman, Davidson andHerman [52] U.S.Cl ..298/8T [57] ABSTRACT i'' A double box dump trailerin which a relatively long rear box OS/61 5 is mounted on the trailerfor dumping with a hydraulic mechanism. A somewhat smaller forward boxis mounted on the trailer for dumping into the rear box with a hydraulic[56] References Cited mechanism. The forward box is provided with anupwardly UNITED STATES PATENTS sloping dumping chute which overlies therear box when the front box is raised to its fullest extent. 2,490,53212/1949 Maxon, Jr ..298/22 P 2,770,490 ll l 956 Hockensmith, Jr ..298/86 Claims, 5 Drawing Figures PATENTEDJUL 4 1972 saw 20f [Wm-"11m.

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A TTOR YE Y6" DOUBLE BOX DUMP Taxman BACKGROUND OF THE INVENTION FIELDOF THE INVENTION The present invention relates to dumping trailers ofthe type designed for carrying the maximumlegal loads.

SUMMARY OF THE INVENTION The present invention is directed to a dumpingtrailer of the type designed for carrying the maximum legal loads inwhich a pair of boxes are mounted on the trailer for dumping with ahydraulic mechanism. The forward box is mounted for a high lift topermit the load to be dumped into the rear box from which it is thendumped onto the ground.

The primary object of the invention is to provide a dumping trailerwhich is stable during dumping, which can carry to separate materialswhich do not mix during transit, and which can carry loads to twodifferent locations.

Other objects and advantages willjbecome apparent in the followingspecification when considered in the light of the attached drawings.

BRIEF DESCRIPTION OF THE DRAMNGS FIG. 1 is a top plan view of theinvention;

FIG. 2 is a sideelevation of the invention; 1

FIG. 3 is a longitudinal sectional view taken along the line 3-3 of FIG.1, looking in the-direction of the arrows;

FIG. 4 is a side elevation of the invention showing the rear box indumping position; and

FIG. 5 is a side elevation of the invention illustrating the forward boxin dumping position.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings indetail wherein like reference characters indicate like parts throughoutthe several figures the reference numeral indicates generally a dumpingtrailer constructed in accordance with the invention.

The dumping tailer 10 is adapted for use with a heavy duty tractor truck11 of conventional construction. The truck 11 has a conventional trailersupport 12 mounted thereon.

The dumping trailer 10 includes an elongate generally horizontal frame13 supported at its forward end on the trailer support 12 and at itsrear end on ground engaging wheels 14.

A generally rectangular dump box 15 is mounted on the frame 13 at therear thereof on a transverse horizontal pivot 16 connecting the rear endof the box 15 to the rear end of the frame 13. The box 15 has agenerally rectangular horizontal bottom wall 17 supporting a pair ofspaced apart parallel side walls I8, 19 which extend upwardly therefrom.A front wall 20 connects the side walls 18, 19 and extends upwardly fromthe bottom wall 17. A tail gate 21 is hingedly connected to the upperrear ends of the side walls 18, 19 for hinging outwardly to the positionillustrated in FIG. 4 when the box 15 is elevated to dumping position.

A telescoping hydraulic cylinder 22 is pivotally connected at one end toa bracket 23 mounted on the frame 13. The hydraulic cylinder 22 ispivotally connected at 23 to the bottom of the box 15. The hydrauliccylinder 22 is connected by suitable means (not shown) to a source ofhydraulic fluid under pressure and a remote control located in the cabof the truck 11 so that when actuated the box 15 is raised at itsforward end about the pivot 16 to a position as illustrated in FIG. 4 todump the contents thereof.

A box 24 is carried by the frame 13 forwardly of the box 15 at theforward end of the frame 13. The box 24 includes a generally rectangularbottom wall 25 having an upwardly and rearwardly sloping extension 26formed integrally therewith. A pair of side walls 27, 28 extend upwardlyfrom the bottom wall 25 and its extension 26 in spaced apart parallelrelation.

A forward wall 29 connects the side walls 27, 28 and extendsperpendicularly upwardly from the bottom wall 25. The side walls 27, 28are spaced apart a distance less than the space between the side wallsl8, 19 of the box 15 as can be seen in FIG. 1 for reasons to beassigned. t

A pair of generally horizontal frame members 30, 31 are secured to thebox 24 at the bottom portion thereof and extend rearwardly therefromgenerally underlying the upwardly sloping extension 26 of the bottomwall 25. The frame members 30, 31 are arranged in spaced apart parallelrelation and have their rear ends secured to brackets 32, 33 formed onopposite sides of the frame 13. Pivot pins 34, 35 secure the framemembers 30, 31 to the brackets 32, 33 respectively.

A telescoping hydraulic cylinder 36 has one end secured to a bracket 37on the frame 13 by means of a pivot pin 38. The opposite end of thehydraulic cylinder 36 is connected by a pivot pin 39 to the box 24. Thehydraulic cylinder 36 is connected by suitable means (not shown) to asource of hydraulic fluid under pressure and to a remote control locatedin the cab of the truck 11 so that when actuated the hydraulic cylinder36 will cause the box 24 to raise pivoting about the pivot 35.

The box 24 is somewhat taller than the box 15 so that the rear edge 40of the extension. 26 is substantially higher than the box 15. When thebox 24 is pivoted to its highest position as illustrated in FIG. 5 theedge 40 of the extension 26 is for ward of the front wall 20 of the box15 and is spaced above the side walls 18 19.

In the use and operation of the invention the trailer 10 has the box 15and the box 24 filled in any conventional manner and is then transportedto the dumping location. After the trailer 10 is properly positioned thebox'15 is dumped by actuation of the hydraulic cylinder 22 and is thenlowered back to the frame 13 The contents of the box 24 is then dumpedinto the box 15 by actuation 'of the hydraulic cylinder 36. The box 24is then lowered to the frame 1.3 and the contents from the box 24 now inthe box 15 are dumped from the box 15 by again actuating the hydrauliccylinder 22. Obviously the contents of the box 15 and the box 24 may beof a different catagory such as having sand in one box and gravel in theother and the contentsof the two boxes may be dumped at separatelocations when desired.

The state laws controlling the size .and weight permitted to be hauledintrucks and trailers are not uniform, however, in many states the lawrequires that a trailer carrying the maximum payload permitted bequitelong in length (in excess of 30 feet). In order to comply with thelaw and obtain the benefits of carrying the maximum payload prior artdumping trailers have used a long single box which is exceedinglyunstable when raised to dumping position particularly if on unstable orsloping ground. Such long singleboxes are adversely affected by wind andby material sticking in the front of the box during the dumpingoperation. Further the long single box requires a much more powerfulhydraulic cylinder for lifting the much greater load and this hydrauliccylinder must also be extendable to a greater height, such as to permitthe forward portion of the box to be raised a considerable distanceabove the frame of the trailer.

The use of the two boxes of the instant invention permits the carryingof the maximum payload allowed on a trailer having a length sufficientto comply with the law. The hydraulic mechanism for raising each of theboxes is of a power and lift height conventionally used with short boxdumping. The height of the load above the trailer frame when dumping issubstantially less than that for a single box trailer.

Having thus described the preferred embodiment of the invenu'on itshould be understood that numerous structural modifications andadaptations may be resorted to without departing from the spirit of theinvention.

What is claimed is:

l. A dumping trailer comprising a generally horizontal frame supportedat one end by ground engaging wheels and adapted for support at theopposite end by a tractor truck, a box, means mounting said box on therear end of said frame for pivotal movement about a transverse axis to adumping position, a second box, and means mounting said second box thewidth of said first box whereby upon pivotal movement of 5 said secondbox into position over said first box the contents of said second boxwill dump into said first box.

2. A device as claimed in claim 1 wherein the means mounting said firstbox includes a hydraulic cylinder for raising said first box to adumping position.

3. A device as claimed in claim 2 wherein the means mounting said secondbox includes a hydraulic cylinder for raising said second box to adumping position.

4. A device as claimed in claim 1 wherein said first box has a generallyhorizontal bottom wall, spaced apart parallel side walls, a transverseforward end wall connecting said side walls and extending upwardly fromsaid bottom wall, and a tail gate pivotally mounted to the rear upperedges of said side walls.

5. A device as claimed in claim 1 wherein said second box has agenerally rectangular generally horizontal bottom wall, an upwardly andrearwardly sloping extension integrally formed on said bottom wall, apair of oppositely disposed parallel side walls extending upwardly fromsaid bottom wall and said extension, and a front wall extending upwardlyfrom said bottom wall connecting said side walls.

6. A device as claimed in claim 5 wherein said means mounting saidsecond box includes a pair of frame members secured to said second boxand extending generally horizontally rearwardly for connection to saidframe.

l l l l

1. A dumping trailer comprising a generally horizontal frame supported at one end by ground engaging wheels and adapted for support at the opposite end by a tractor truck, a box, means mounting said box on the rear end of said frame for pivotal movement about a transverse axis to a dumping position, a second box, and means mounting said second box on said frame forwardly of said first box for pivotal movement about a transverse axis to a dumping position overlying said first box, said second box having a height substantially greater than the height of said first box and a width slightly less than the width of said first box whereby upon pivotal movement of said second box into position over said first box the contents of said second box will dump into said first box.
 2. A device as claimed in claim 1 wherein the means mounting said first box includes a hydraulic cylinder for raising said first box to a dumping position.
 3. A device as claimed in claim 2 wherein the means mounting said second box includes a hydraulic cylinder for raising said second box to a dumping position.
 4. A device as claimed in claim 1 wherein said first box has a generally horizontal bottom wall, spaced apart parallel side walls, a transverse forward end wall connecting said side walls and extending upwardly from said bottom wall, and a tail gate pivotally mounted to the rear upper edges of said side walls.
 5. A device as claimed in claim 1 wherein said second box has a generally rectangular generally horizontal bottom wall, an upwardly and rearwardly sloping extension integrally formed on said bottom wall, a pair of oppositely disposed parallel side walls extending upwardly from said bottom wall and said extension, and a front wall extending upwardly from said bottom wall connecting said side walls.
 6. A device as claimed in claim 5 wherein said means mounting said second box includes a pair of frame members secured to said second box and extending generally horizontally rearwardly for connection to said frame. 